不同肥力红壤旱地对季节性干旱条件的响应特征  

Response Characteristics of Red Soil Dryland with Different Fertility to Seasonal Drought Conditions

作　　者：徐武峰 倪烈 赵仲仁[2] XU Wu-feng;NI Lie;ZHAO Zhong-ren(Huifeng Biotechnology Co.,Ltd.in Tonglu of Zhejiang,Tonglu 311599,PRC;Institute of Agriculture Science,Plantation of Dengjia Town of Jiangxi,Yujiang 335200,PRC)

机构地区：[1]浙江桐庐汇丰生物科技有限公司,浙江桐庐311599 [2]江西省邓家埠水稻原种场农科所,江西余江335200

出　　处：《湖南农业科学》2018年第11期56-58,62,共4页Hunan Agricultural Sciences

基　　金：江西省科技支撑项目资助(20141BBF60050)

摘　　要：为了探讨不同肥力等级红壤旱地对季节性干旱的响应特征,选取高中低肥力的红壤旱地,系统研究土壤容重、有机质含量及连续干旱条件下土壤含水量变化。结果显示:在红壤旱地上,0～20 cm土层中,高肥力处理的容重分别比中肥力和低肥力降低了8.15%和3.45%;同时,高肥力在0～20 cm和20～40 cm的土壤有机质含量分别比中肥力提高了12.63%和17.48%,比低肥力增加了18.26%和22.68%;连续干旱降低了红壤旱地的土壤含水量,但高肥力等级的土壤可以有效减缓干旱引起的表层土壤含水量下降速度。In order to explore the response characteristics of red soil uplands with different fertility levels to seasonal drought,high and low fertility red soil uplands were selected to systematically study the changes of soil bulk density,organic matter content and soil water content under continuous drought conditions.The results showed that the bulk density of high-fertility treatments decreased by 8.15%and 3.45%in 0-20 cm soil layer compared with medium-fertility and low-fertility treatments,respectively.At the same time,the organic matter content of soil with high fertility in 0-20 cm and 20-40 cm was 12.63%and 17.48%higher than that of medium fertility,18.26%and 22.68%higher than that of low fertility,respectively.Continuous drought reduces soil water content in red soil upland,but high fertility grade soil can effectively slow down the decline rate of surface soil water content caused by drought.

关 键 词：红壤旱地 连续干旱 土壤有机质 土壤含水量 

分 类 号：S152.7[农业科学—土壤学]